Making up the regular voluntary prayers if their time has passed

The questioner:
The questioner says: We have some lectures at the university, so the doctor does not leave until I want the iqamah (the second call to prayer) from the electricity [i.e., until the power is restored]. Sometimes he prays four rak'ahs, and sometimes two. Is it permissible to make up the third [prayer] after the prayer of al-Rada [likely a mishearing of al-Zuhr or a specific context], or not? We have some lectures, so the doctor does not leave until I want the iqamah from the electricity. Sometimes he prays four...

The Shaykh:
I mean before the midday prayer.

The questioner:
And sometimes two rak'ahs. So, is it permissible to make up the third [prayer] after the nearby prayer, or not?

The Shaykh:
No. The regular voluntary prayer (rawatib), if its time has passed, is not made up, except for the regular voluntary prayer of Fajr. The regular voluntary prayer of Fajr is made up after it. As for the regular voluntary prayer of Zuhr, it is not made up after it, because it is a recommended practice (sunnah) whose time has passed. Making up prayers is specific to obligatory prayers, or to what has been reported as being made up, such as the regular voluntary prayer of Fajr.